Cluster lamp-socket.



H. J; S. LEWIS.

CLUSTER LAMP SOCKET. APPLIQATION FILED MAY 27,'1908.

936,463. Patented 0ct...12,19o9.

I WITNESSES: Y

M azz;

UNTED STATES HERMAN J'. S. IJEIS,` OF NEW YORK, N.

PATENT OFFICE.

Y., SSIGNOR TO JOHNI H. DALE. OF NEW YORK, N. Y.

CLUSTER LAMP-SOCKET.

To all whom if 'may concern:

"Be it known that l, HERMAN J. S. Lnivis, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful improvements in Cluster Lamp-Sockets, of which the. following is a full, clear, and exact description.

My invention relates to cluster lamp sockf ets, particularly of that type having a substantially heini-spherical casing from which the lamps project symmetrically outward v1n directions which are generally radial to the surface of said casing.

In a co-pending application Serial No. 431,146, and also in an application Serial -No. 384,498, filed by Edward .Le Febre,

there is set forth a construction for the above ent application covers a form orf construction also making use of this ring construction, and having certain additional and improved features.

In'carrying out the present invention, the threaded shells are secured to the insulating ringby loops or bands which pass around and through the center of the latter where they engage and make Contact with a terminal ring. The center contacts or connections are established by a band or ring on the exterior periphery of said insulating ring which lies in a zone corresponding to the center contacts of the lamps. l also'provide for assembling the parts to form receptacles for different numbers of lamps.

With these various and other objects in view, my invention consists in the features' of construction and combination as hereinafter set forth and claimed.

in the drawings, Figure 1 is a top or plan Viewv of a cluster socket embodying the principles of my invention. Fig. 2 is an henlarged vert-ical sectional view of a portion of the same taken generally on line lI*II of Fig. 1. Fig. '3 is another sectional view .showing the attachment ci? a pair of threaded shells.

Sp'eocation of Letters Patent.

Application filed May 27,

has peripheral.

Patented Oct. 12, 1909. 1908. serial No. 435,218.

nie-ans of insulating bushings 4. The vaiious threaded shells are mechanically connected together by a. central insulating ring 5, which has an additional function of supporting the center contacts. The threaded shells project outward from the ring 5, being connectedthereto in a special manner and forming an important part of the pres# ent'invention. I' provide loops'or stra-ps 7 of 'flexible sheet metal which are adapted to be tightly bent around the ring 5,' passing through the central opening thereof and connected with the threaded shells. The

Fig. 3, in which the straps have hooked portions 8 at their extremities which arcsecured to the threaded shells by rivets 9; I y prefer to make the ring 5 in two equatorially or transversely divided sections or halves, channeled .or recessed along the'edges of their en aging faces `so as to form two comparative y' deep annular grooves 13, and 14 respectively on the exterior Aand interior peripheral surfaces thereof. In the exterior groove 13, I seat a continuous or other inetallic ring or band 15, and in the interior groove 14, I provide a corresponding cona rounded, convex or beaded exposed sur'- face. The band 15 constitutes a common center contact connection or terminal for the lamps, while the baud 16 is in a posit-ion to be engaged by the .various loops or straps 7 which pass through the intei'ior of the .ring 5 and over the surface of said band 16. At the points where said loops or straps 7 engage over the surface of said band 16, theloops or straps are preferably rounded to conform to the outline presented. It is evident that a coninion electrical connection is made with all of the threaded shells in this way. The bands or rings 15 and 16 maybe absolutely solid or seamless, or they may havea joint, but in any case they are easily insertible Within the insulating ring 5 by reason of the split construction of the latter.

The circuit connections are made in any or bands 15 and 16. In Fig. 2, I have illustrated L-shaped clips 1S and 19 riveted respectively to the exterior ring or band 15 i and the interior band .16. .These clips-ex.

received and held in the openings 2 by'd preferred construction is that best shown in j convenient Wav from the respective ringsA tinuous or other ring or band 16. Each of these metallic rings or bandspreferably has tend upward above the plane of the top surface of the insulating ring 5.

20 designate terminal screws in the respective clips to which the circuit wires are attached.

In order that. the threaded shells may be pro er1 spaced apart around the ring 5, I pre era ly form upon each loop o1'- strap an interiorly rbjecting lug. 22 which enters a correspon lng-radial groove or recess 23 on theuppe-r surface of said ring 5. A con-l siderable number of grooves are provided corresponding to various angular relations of the threaded shells, so that by employing diiierent grooves, the threaded shells may be symmetrically spaced apart for any number of lamps from one to six."

What I claim, is 1. In a cluster socket, a transversely di; videdV insulating' ring, threaded shells "se cured j thereto, and means received'- between the halves or sections of saidring and afording center contacts arou'ndgthe outsidel periphery of the ring.

2. In a4 cluster socket, a transversely dil vided insulating ring, threaded shells; s e`- cured thereto, a' metallic ring; for band' received between thehalves :off .Sections of Said ring and affording V.center-jf c'oiita'ctsf around. the outside 'periphery`-,ofthegrin 3i In a cluster socket; en insiating t-ransV versely divided? rm having aff peripheral kring,

groove, threaded( lsasecuredtojsai and means received'fin s aldlgroove between the divisions of said versely divided rin 6. In a Acluster-socket, a transversely di-rv vided. insulating ringfhaving interior and exterior grooves, metallic rings orl bands received. in said grooves', and' threaded shells having loops or strapsengagingsa'id interior or band.

;7 Inacluster socket, an insulatingring 'having interior and exterior grooves, metallicl rings or :bands received in said ,threaded shells connected to the interior ring or'band, and metallic clips 'projecting up-. ward from botl' of said ringsv or bands'and aiordingl terminal connections. In witnessjwhereoL'I subscribe my'signa- `ture, in the presence of two witnesses.

ooves,

HERMAN J. s. LEWIS;l iitm'es'sjesry '.WALno'M. CHABIN, VJar/ms DANToNIo.

ring and affording kcen- 

